https://www.blueovalclassics.ca/electrical/switches/wiper-switch/windshield-wiper-switch-spacer-fits-behind-dash-falcon-comet
Scott Drake 1964-1966 Ford Mustang Wiper Switch Spacer C4DZ-17C443-A | Blue Oval Classics
Model 3216369 - Scott Drake 1964-1966 Ford Mustang Wiper Switch Spacer C4DZ-17C443-A - Used to install wiper switch to dash. Once a hard part to find now...